The user has provided an image containing a mathematical expression. The task is to transcribe and represent this expression in a structured format.

Mathematical Expression:

\( \frac{\left( 3.4 - 1.245 \right) \cdot \frac{16}{14}}{\frac{5}{18} \cdot \left( \sqrt{\frac{7}{85}} + 6 \cdot \frac{2}{9} \right)} + 0.5 \left( 2 + \frac{12.5}{3.75 + \frac{1}{2}} \right) \)